diff --git a/lib/Context/Internal/ProcessHub.php b/lib/Context/Internal/ProcessHub.php
index a7bb726..5952d3d 100644
--- a/lib/Context/Internal/ProcessHub.php
+++ b/lib/Context/Internal/ProcessHub.php
@@ -30,6 +30,9 @@ class ProcessHub
     /** @var Deferred[] */
     private $acceptor = [];
 
+    /** @var string|null */
+    private $toUnlink;
+
     public function __construct()
     {
         $isWindows = \strncasecmp(\PHP_OS, "WIN", 3) === 0;
@@ -37,7 +40,10 @@ class ProcessHub
         if ($isWindows) {
             $this->uri = "tcp://127.0.0.1:0";
         } else {
-            $this->uri = "unix://" . \tempnam(\sys_get_temp_dir(), "amp-parallel-ipc-") . ".sock";
+            $suffix = \bin2hex(\random_bytes(10));
+            $path = \sys_get_temp_dir() . "/amp-parallel-ipc-" . $suffix . ".sock";
+            $this->uri = "unix://" . $path;
+            $this->toUnlink = $path;
         }
 
         $this->server = \stream_socket_server($this->uri, $errno, $errstr, \STREAM_SERVER_BIND | \STREAM_SERVER_LISTEN);
@@ -88,6 +94,9 @@ class ProcessHub
     {
         Loop::cancel($this->watcher);
         \fclose($this->server);
+        if ($this->toUnlink !== null) {
+            @\unlink($this->toUnlink);
+        }
     }
 
     public function getUri(): string
diff --git a/lib/Context/Process.php b/lib/Context/Process.php
index cda4f6a..b37fe6b 100644
--- a/lib/Context/Process.php
+++ b/lib/Context/Process.php
@@ -109,7 +109,8 @@ final class Process implements Context
 
                 $contents = \file_get_contents(self::SCRIPT_PATH);
                 $contents = \str_replace("__DIR__", \var_export($path, true), $contents);
-                self::$pharScriptPath = $scriptPath = \tempnam(\sys_get_temp_dir(), "amp-process-runner-");
+                $suffix = \bin2hex(\random_bytes(10));
+                self::$pharScriptPath = $scriptPath = \sys_get_temp_dir() . "/amp-process-runner-" . $suffix . ".php";
                 \file_put_contents($scriptPath, $contents);
 
                 \register_shutdown_function(static function () {